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What is RAID Collapse? Introduce the cause of the outbreak and how to deal with it.
LemonDKel
2022. 8. 4. 09:07
When using equipment such as a server, RAID corruption mode is displayed on the management screen, data is no longer accessible, data is no longer read or written, and what number of HDD is broken is displayed.Here are some symptoms, causes, and solutions to help resolve problems as soon as possible in the event of a RAID collapse.
Table of Contents
1. What is RAID?
1.1. What is RAID Collapse?
1.2. Redundant RAID
1.3. Differences in RAID Types and Modes
1.3.1. RAID 0 (Striping)
1.3.2. RAID 1 (Mirroring)
1.3.3. RAID 5 (Distributed Data Gardening)
1.3.4.RAID6
1.3.5. RAID 10 (RAID 1+0)
1.3.6. RAID 50 (RAID 5+0)
1.4. Causes of RAID Collapse
1.4.1.1. Hard Drive Life
1.4.2.2. Damage to magnetic disk (platter) due to dust, cigarette smoke, etc.
1.4.3.3. Effects of heat
1.4.4.4. Failed or Wrong Rebuild
1.4.5.5. If one hard drive breaks, the other hard drive may fail.
1.4.6.6. Failed to remove hard drive
1.4.7.7. Failed while checking hard drive (data deletion or formatting)
1.4.8.8. Management screen error
1.5. Recovery and countermeasures in the event of a RAID collapse
1.5.1.1. Utilization of restoration and restoration software
1.5.2.2. Consultation with a specialized data recovery company
1.6. Things that should not be done in the event of a RAID collapse and things to be careful about
1.6.1.1. Repeat power on/off/restart
1.6.2.2. Replace or Replace Hard Drives
1.6.3.3. Rebuild operations and data reconstruction
1.6.4.4. Allow HDD to be recognized by itself
1.6.5.5. Replacing the RAID Controller Card
1.7. How to Prevent RAID Collapse
2. Summary - In the unlikely event that RAID collapses,
What is RAID?
RAID stands for Redundant Array of Inexpensive Disks, or Redundant Array of Inexpensive Disks.RAID is a combination of hard drives and SSDs that make it look like a single drive.When an administrator sets up a RAID configuration on a NAS or server device, the device internally generates parity and builds RAID.Parity is a code that is calculated to correct and detect errors when recording or passing data, and is automatically generated.The advantages of deploying RAID are: RA RAID type (mode) allows data recovery and access even if a hard drive fails. データ Faster data write and access processing. データ Amplification of data recording volume.
What is RAID Collapse?
RAID collapse refers to a condition in which the following symptoms are occurring:
1. RAID collapse mode is displayed on the web management screen.
2. A warning message such as RAID configuration corruption is displayed.
3. RAID Array Cannot Be Mounted
4. RAID configuration error is displayed
5. ′RAID Error′ is displayed on the LCD (Liquid Crystal Display) of devices such as servers and NAS.
6. Data is no longer accessible · Shared folders are no longer accessible
7. No longer able to read or write data
8. The RAID configuration is not working properly or is not available.
9. What number of hard drive is broken?
10. Hard drive error in management screen such as ZWS Manager
11. Saved data disappeared · Saved data lost
↓ Here′s how to resolve shared folders if they are no longer accessible
AT DATA RECOVERY MEDIUM
What to do if Windows 10 cannot access shared folders?
https://www.adte.jp/rec/hdd/post-1115/
′I cannot access it.You may not have permissions to use this network resource, and you may lose access to the shared folder with error messages such as ′Access denied′.Here′s how to deal with Windows 10 when you can′t access or connect to shared folders.
↓ Click here to check for and repair hard drive errors
AT DATA RECOVERY MEDIUM
HARD DISK ERROR CHECKING AND RECOVERY METHOD
https://www.adte.jp/rec/hdd/post-1218/
Have you ever been confused by an error on your computer while using a hard disk?If a hard disk fails, such as ′A hard disk problem has been detected,′ don′t panic and check one by one.This section describes how to repair an error message when using a hard disk or when an error is detected.
Redundant RAID
Redundancy is an IT term for preparing a spare system by duplicating the entire network system.Redundancy is what makes the system secure and reliable.RAID is a combination of hard drives for redundancy.
Differences in RAID Type and Mode
RAID 0 (striping)
RAID 1 (mirroring)
RAID 01
RAID 10 (RAID 1+0)
RAID 2
RAID 3
RAID 4
RAID 5 (Distributed Data Gardening)
RAID 6
RAID 50 (RAID 5+0)
RAID 0 (striping)
RAID 0 (striping) is a mode in which data is distributed and written across two or more hard drives.Benefits include faster data writes and the most efficient use of disk storage.The disadvantage is that there is no redundancy, so if one of the hard drives fails, the data will not be accessible.
RAID 1 (mirroring)
RAID 1 (mirroring) is a mode that copies (replicates) and writes the same data to two hard drives for redundancy.The benefit is that in the event of a single hard drive failure, there is a hard drive that stores the same data, so it can be recovered immediately, and the system can continue to run without stopping.The disadvantage is that the cost and capacity of writing the same data to multiple disks can be doubled, and in the unlikely event that both disks fail, recovery is difficult.
RAID 5 (Distributed Data Gardening)
RAID 5 (Distributed Data Gardening) always stores parity data for one HDD capacity, enabling recovery from parity of data that is lost in the unlikely event of a disk failure.The benefit is that the combination of data and parity on a non-failure hard drive allows recovery without loss of data, the ability to keep the system up and running even if one of the hard drives fails, and the risk of equipment failure can be reduced.The disadvantage is that the CPU is loaded when performing parity operations.Using parity to restore lost data and restore the system to a normal state is called a rebuild.
RAID 6
RAID 6 and RAID 5 are similar technologies.The difference between the two modes is the use of parity.The benefits of RAID 6 are that it can double-generate parity and record on different HDDs, reducing the risk of failure over RAID 5 and automatically recovering if two disks fail, but RAID 6 can recover original data from remaining data even if two disks fail.The disadvantage is that the amount of parity generated increases, resulting in lower write performance and capacity efficiency than RAID 5.
RAID 10 (RAID 1+0)
RAID 10 is a combination of RAID 0 and RAID 1.This mode copies (replicates) and writes the same data to two disks as RAID 1 (mirroring).The advantage is that you can write data in parallel by dividing it into blocks, so you can write data faster.RAID 10 (RAID 1+0) is a combination of RAID 0 speed and RAID 1 redundancy.
RAID 50 (RAID 5+0)
RAID 50 is a combination of RAID 0 and RAID 5.Multiple RAID 5 equipment is provided, each with a RAID 0 (striping) operation.The advantage is that more disks are written in parallel, so the transfer speed can be faster than when RAID 5 alone is built.The disadvantage is that it requires at least six disks, which is expensive.
↓See also RAID types, failures, and recovery methods
AT DATA RECOVERY MEDIUM
How to recover and restore data with RAID | Learn how to do it and take notes!
https://www.adte.jp/rec/hdd/post-748/
One way to store important data is to use a RAID configured device.There are different types of RAID, each operating and recovery methods.Learn how to recover and respond to RAID failures such as inaccessible, inaccessible, unable to connect, unable to enter shared folders, data disappeared, and errors.
What Causes RAID Collapse?
When a RAID collapse occurs, the following causes may be considered:
1. Hard Drive Life
2. Damage to magnetic disk (platter) due to dust, cigarette smoke, etc.
3. Effects of heat
4. Failed rebuilds or incorrect methods
5. If one hard drive breaks, the other hard drive may fail.
6. Failed to remove hard drive
7. Failed while checking hard drive (data deletion or formatting)
8. Operation error on the management screen
1. Hard Drive Life
Hard drives typically live between four and five years.The life of a hard drive in a server or NAS can cause RAID corruption.A hard drive is one of the precision instruments that is at risk of failure someday.During bootup, the hard drive is spinning at high speed on a disk called a platter on which data is recorded.A head for reading data from a platter.These two parts are prone to failure compared to other PC and precision equipment parts.Hard drives can be short-lived due to logical as well as physical failures.
2. Damage to magnetic disk (platter) due to dust, cigarette smoke, etc.
Fine particles such as dust and cigarette smoke can also damage the magnetic disk (platter) around the HDD, which can cause failure.Not only HDD, but also peripherals such as PCs, servers, and NAS are precision machines.Dust, dust, etc. accumulate on the equipment or enter the inside of the parts, which will lead to failure.
3. Effects of heat
The risk of failure increases when using a hard drive in a hot environment such as a hot day.Be careful not to have a room temperature above 30 to 35 degrees.If the temperature in the server or NAS is above 40 degrees, the hard drive will not work properly, the RAID will collapse, the operation speed will slow down, and abnormalities may occur.
4. Failed rebuilds or incorrect methods
A rebuild is the re-configuration of data in a corrupted hard drive.If the hard drive that is building RAID fails, the data can be recovered by rebuilding.However, data cannot be recovered if the rebuild fails or if the rebuild is done incorrectly, which can cause RAID corruption.It is important to read the instructions carefully before rebuilding.Be careful when rebuilding after understanding the contents.
↓ For more information on rebuild failures and recovery methods, please visit here.
AT DATA RECOVERY MEDIUM
RAID rebuild (rebuild) failed or Method
https://www.adte.jp/rec/hdd/post-1549/
If a hard drive that is configured for RAID is damaged, data can be recovered by replacing the hard drive and reconfiguring it (rebuilding), and many of you may recognize that the system can be restored to its original state.However, reconstruction itself is a high risk.
5. If one hard drive breaks, the other hard drive may fail.
One hard drive may fail and the other hard drive may fail while being replaced, resulting in RAID corruption.This means that multiple HDDs in a server or other device are often manufactured at the same time as the first failed hard drive, and the timing of breakage and life expectancy is often the same.
6. Failed to remove hard drive
If you remove the failed hard drive and return it in the wrong order or place after checking, it may cause RAID corruption.The location and order of the hard drives in the server equipment are determined.The image is similar to that of a book or a novel, when the order changes, the story changes and the content becomes unclear.If the order of disk removal and installation changes, the integrity of the stored data will be disrupted.
7. Failed while checking hard drive (data deletion or formatting)
When you disconnect a hard drive from a NAS or server and connect it directly to a PC, you may erase the data that was incorrectly saved while trying to verify the data, or you may accidentally format it (initialize).It is important not to panic when working.
8. Operation error on the management screen
If you make a mistake or make a mistake on the management screen, it will lead to RAID collapse.If the hard drive works or fails, open the management screen to change the RAID type to a different type, or initialize the hard drive, so be careful.
How to recover and deal with RAID corruption
Learn what to do in the event of a RAID corruption.
1. Utilization of restoration and restoration software
2. Consultation with a specialized data recovery company
1. Utilization of restoration and restoration software
In the event of a RAID collapse, there is a way to attempt to recover data using the restore software.However, while the restoration software is easy to start using, there is a risk that the data will be overwritten and the condition will deteriorate.In addition, if the hard drive itself is experiencing a physical failure, it cannot be recovered by using the restore software.I often find software that matches my symptoms, and sometimes I only have English manuals and explanations, so I sometimes worry about it.If your data is important, it is also important not to be particular about using the restoration software.
2. Consultation with a specialized data recovery company
When problems such as RAID corruption mode displayed on the management screen, inaccessible data, and what number of HDD is displayed as corrupted, RAID corruption is often more than one cause, and it is often difficult to identify the cause or recover.In case of trouble, start by turning off your server, NAS, and other devices without panic.Professional data recovery companies have expertise and restoration technology to handle any problems that may arise in the event of a RAID crash.If you are storing important data, have a file to use immediately, have a problem with your business, or don′t want to fail, consider consulting a professional data recovery company.Complex information analysis, situational analysis, and recovery work require high technical capabilities.As a criterion for determining the technical capabilities of the restoration company, it will be smooth to check if they have AI technology.
Things you shouldn′t do in the event of a RAID collapse and things you should be careful about
It is important to try not to get worse when a RAID collapse occurs.Please note the following points.
1. Repeat turning on/off/restarting the power supply
2. Replace or replace hard drives
3. Rebuild operations and data reconstruction
4. Recognize the hard drive alone
5. Replacing the RAID Controller Card
1. Repeat turning on/off/restarting the power supply
Avoid repeated power-on/off or reboots of equipment during a RAID crash.Sometimes the condition gets worse.
2. Replace or replace hard drives
Data is not accessible and data recovery is generally possible when a failed hard drive is replaced with a new hard drive in the event of a RAID collapse.However, if you put it back in the wrong order or place, the RAID will collapse and the data will be corrupted.Also, be careful as replacing the hard drive will automatically rebuild.
3. Rebuild operations and data reconstruction
A rebuild is the re-configuration of data in a corrupted hard drive.Rebuilds can restore data, but rebuilds can lead to multiple hard drive failures from a single hard drive failure at first, or deteriorate if data rebuild fails during a rebuild.If the hard drive in the NAS fails, reconstructing or reconfiguring configuration information and data will cause data to disappear, disappear, or initialize, so be careful.If your data is important, the best solution is to turn it off and not turn it on.
4. Recognize the hard drive alone
Even if you take one hard drive out of the NAS and connect it directly to your computer, you won′t be able to access the stored data.Sometimes when I connect directly to the computer, I get a message asking, ′Do you want to format it?′Be careful not to press ′yes′ in a hurry.Once formatted, the data stored on the hard drive will disappear.Format = After initialization, even if you try to build RAID again, you will not be able to read the data.In addition, if the HDD itself fails and energizes, the condition may deteriorate and the data may be overwritten.
5. Replacing the RAID Controller Card
Care should also be taken when a RAID controller card fails or fails.Many cards are special and require specialized knowledge to check and replace compatible cards.If a RAID controller card is replaced with an incompatible hard drive when the hard drive has not failed or failed, you may not be able to read or access the stored data.
↓ If you suspect a RAID controller card failure, please refer to this page.
AT DATA RECOVERY MEDIUM
How to Recover from a RAID Controller Failure
https://www.adte.jp/rec/hdd/post-1500/
US>The RAID controller may fail, such as the file server that is configured for RAID will not start and data will no longer be accessible.The NAS and file servers that make up RAID are often run in locations or backup elements where data is shared at work, school, or home, and once trouble occurs, it may affect not only one person but also multiple people.This section describes the symptoms, possible causes, and recovery methods that occur when a RAID controller fails.
How to Prevent RAID Collapse
If you are building RAID, the equipment will remain operational if the failure of the hard drive is not in the redundancy category.However, if you continue to operate with a defect, one failure will lead to a second failure, which increases the risk of data loss, so you need to be careful.How do I prevent RAID corruption and data loss
①Prepare and prepare replacement hard drives in advance
②Replace the hard drive immediately after one hard drive fails
③rebuild early after replacing the hard drive
It′s also important.
As mentioned above, there is a risk of rebuilding.I checked the procedure of rebuilding on the web, but I don′t understand it well, I read the instruction manual, but I′m worried about how to deal with it or how to do it, so let′s not force ourselves to proceed.In that case, it is important to turn off the power of the device.Consider shutting down and consulting a professional recovery company.This is because if you proceed with the work without knowing it well, you may end up in situations where important data will disappear and it will be difficult to recover the data.Summary - In the unlikely event that RAID collapses,
If you experience problems such as RAID corruption, loss of access to data, loss of read/write, broken number of HDD, or displaying RAID Error on the LCD of the device, you should turn off the device and consult a professional recovery company as soon as possible.This is because if the hard drive or SSD that is building RAID fails or fails, the condition will deteriorate if the power is turned on/off and rebooted repeatedly.RAID systems are often complex and require advanced technical skills and expertise.Advanced technology has AI technology to handle any trouble with RAID corruption.It is also recommended for those who want to save money and restore it.
Table of Contents
1. What is RAID?
1.1. What is RAID Collapse?
1.2. Redundant RAID
1.3. Differences in RAID Types and Modes
1.3.1. RAID 0 (Striping)
1.3.2. RAID 1 (Mirroring)
1.3.3. RAID 5 (Distributed Data Gardening)
1.3.4.RAID6
1.3.5. RAID 10 (RAID 1+0)
1.3.6. RAID 50 (RAID 5+0)
1.4. Causes of RAID Collapse
1.4.1.1. Hard Drive Life
1.4.2.2. Damage to magnetic disk (platter) due to dust, cigarette smoke, etc.
1.4.3.3. Effects of heat
1.4.4.4. Failed or Wrong Rebuild
1.4.5.5. If one hard drive breaks, the other hard drive may fail.
1.4.6.6. Failed to remove hard drive
1.4.7.7. Failed while checking hard drive (data deletion or formatting)
1.4.8.8. Management screen error
1.5. Recovery and countermeasures in the event of a RAID collapse
1.5.1.1. Utilization of restoration and restoration software
1.5.2.2. Consultation with a specialized data recovery company
1.6. Things that should not be done in the event of a RAID collapse and things to be careful about
1.6.1.1. Repeat power on/off/restart
1.6.2.2. Replace or Replace Hard Drives
1.6.3.3. Rebuild operations and data reconstruction
1.6.4.4. Allow HDD to be recognized by itself
1.6.5.5. Replacing the RAID Controller Card
1.7. How to Prevent RAID Collapse
2. Summary - In the unlikely event that RAID collapses,
What is RAID?
RAID stands for Redundant Array of Inexpensive Disks, or Redundant Array of Inexpensive Disks.RAID is a combination of hard drives and SSDs that make it look like a single drive.When an administrator sets up a RAID configuration on a NAS or server device, the device internally generates parity and builds RAID.Parity is a code that is calculated to correct and detect errors when recording or passing data, and is automatically generated.The advantages of deploying RAID are: RA RAID type (mode) allows data recovery and access even if a hard drive fails. データ Faster data write and access processing. データ Amplification of data recording volume.
What is RAID Collapse?
RAID collapse refers to a condition in which the following symptoms are occurring:
1. RAID collapse mode is displayed on the web management screen.
2. A warning message such as RAID configuration corruption is displayed.
3. RAID Array Cannot Be Mounted
4. RAID configuration error is displayed
5. ′RAID Error′ is displayed on the LCD (Liquid Crystal Display) of devices such as servers and NAS.
6. Data is no longer accessible · Shared folders are no longer accessible
7. No longer able to read or write data
8. The RAID configuration is not working properly or is not available.
9. What number of hard drive is broken?
10. Hard drive error in management screen such as ZWS Manager
11. Saved data disappeared · Saved data lost
↓ Here′s how to resolve shared folders if they are no longer accessible
AT DATA RECOVERY MEDIUM
What to do if Windows 10 cannot access shared folders?
https://www.adte.jp/rec/hdd/post-1115/
′I cannot access it.You may not have permissions to use this network resource, and you may lose access to the shared folder with error messages such as ′Access denied′.Here′s how to deal with Windows 10 when you can′t access or connect to shared folders.
↓ Click here to check for and repair hard drive errors
AT DATA RECOVERY MEDIUM
HARD DISK ERROR CHECKING AND RECOVERY METHOD
https://www.adte.jp/rec/hdd/post-1218/
Have you ever been confused by an error on your computer while using a hard disk?If a hard disk fails, such as ′A hard disk problem has been detected,′ don′t panic and check one by one.This section describes how to repair an error message when using a hard disk or when an error is detected.
Redundant RAID
Redundancy is an IT term for preparing a spare system by duplicating the entire network system.Redundancy is what makes the system secure and reliable.RAID is a combination of hard drives for redundancy.
Differences in RAID Type and Mode
RAID 0 (striping)
RAID 1 (mirroring)
RAID 01
RAID 10 (RAID 1+0)
RAID 2
RAID 3
RAID 4
RAID 5 (Distributed Data Gardening)
RAID 6
RAID 50 (RAID 5+0)
RAID 0 (striping)
RAID 0 (striping) is a mode in which data is distributed and written across two or more hard drives.Benefits include faster data writes and the most efficient use of disk storage.The disadvantage is that there is no redundancy, so if one of the hard drives fails, the data will not be accessible.
RAID 1 (mirroring)
RAID 1 (mirroring) is a mode that copies (replicates) and writes the same data to two hard drives for redundancy.The benefit is that in the event of a single hard drive failure, there is a hard drive that stores the same data, so it can be recovered immediately, and the system can continue to run without stopping.The disadvantage is that the cost and capacity of writing the same data to multiple disks can be doubled, and in the unlikely event that both disks fail, recovery is difficult.
RAID 5 (Distributed Data Gardening)
RAID 5 (Distributed Data Gardening) always stores parity data for one HDD capacity, enabling recovery from parity of data that is lost in the unlikely event of a disk failure.The benefit is that the combination of data and parity on a non-failure hard drive allows recovery without loss of data, the ability to keep the system up and running even if one of the hard drives fails, and the risk of equipment failure can be reduced.The disadvantage is that the CPU is loaded when performing parity operations.Using parity to restore lost data and restore the system to a normal state is called a rebuild.
RAID 6
RAID 6 and RAID 5 are similar technologies.The difference between the two modes is the use of parity.The benefits of RAID 6 are that it can double-generate parity and record on different HDDs, reducing the risk of failure over RAID 5 and automatically recovering if two disks fail, but RAID 6 can recover original data from remaining data even if two disks fail.The disadvantage is that the amount of parity generated increases, resulting in lower write performance and capacity efficiency than RAID 5.
RAID 10 (RAID 1+0)
RAID 10 is a combination of RAID 0 and RAID 1.This mode copies (replicates) and writes the same data to two disks as RAID 1 (mirroring).The advantage is that you can write data in parallel by dividing it into blocks, so you can write data faster.RAID 10 (RAID 1+0) is a combination of RAID 0 speed and RAID 1 redundancy.
RAID 50 (RAID 5+0)
RAID 50 is a combination of RAID 0 and RAID 5.Multiple RAID 5 equipment is provided, each with a RAID 0 (striping) operation.The advantage is that more disks are written in parallel, so the transfer speed can be faster than when RAID 5 alone is built.The disadvantage is that it requires at least six disks, which is expensive.
↓See also RAID types, failures, and recovery methods
AT DATA RECOVERY MEDIUM
How to recover and restore data with RAID | Learn how to do it and take notes!
https://www.adte.jp/rec/hdd/post-748/
One way to store important data is to use a RAID configured device.There are different types of RAID, each operating and recovery methods.Learn how to recover and respond to RAID failures such as inaccessible, inaccessible, unable to connect, unable to enter shared folders, data disappeared, and errors.
What Causes RAID Collapse?
When a RAID collapse occurs, the following causes may be considered:
1. Hard Drive Life
2. Damage to magnetic disk (platter) due to dust, cigarette smoke, etc.
3. Effects of heat
4. Failed rebuilds or incorrect methods
5. If one hard drive breaks, the other hard drive may fail.
6. Failed to remove hard drive
7. Failed while checking hard drive (data deletion or formatting)
8. Operation error on the management screen
1. Hard Drive Life
Hard drives typically live between four and five years.The life of a hard drive in a server or NAS can cause RAID corruption.A hard drive is one of the precision instruments that is at risk of failure someday.During bootup, the hard drive is spinning at high speed on a disk called a platter on which data is recorded.A head for reading data from a platter.These two parts are prone to failure compared to other PC and precision equipment parts.Hard drives can be short-lived due to logical as well as physical failures.
2. Damage to magnetic disk (platter) due to dust, cigarette smoke, etc.
Fine particles such as dust and cigarette smoke can also damage the magnetic disk (platter) around the HDD, which can cause failure.Not only HDD, but also peripherals such as PCs, servers, and NAS are precision machines.Dust, dust, etc. accumulate on the equipment or enter the inside of the parts, which will lead to failure.
3. Effects of heat
The risk of failure increases when using a hard drive in a hot environment such as a hot day.Be careful not to have a room temperature above 30 to 35 degrees.If the temperature in the server or NAS is above 40 degrees, the hard drive will not work properly, the RAID will collapse, the operation speed will slow down, and abnormalities may occur.
4. Failed rebuilds or incorrect methods
A rebuild is the re-configuration of data in a corrupted hard drive.If the hard drive that is building RAID fails, the data can be recovered by rebuilding.However, data cannot be recovered if the rebuild fails or if the rebuild is done incorrectly, which can cause RAID corruption.It is important to read the instructions carefully before rebuilding.Be careful when rebuilding after understanding the contents.
↓ For more information on rebuild failures and recovery methods, please visit here.
AT DATA RECOVERY MEDIUM
RAID rebuild (rebuild) failed or Method
https://www.adte.jp/rec/hdd/post-1549/
If a hard drive that is configured for RAID is damaged, data can be recovered by replacing the hard drive and reconfiguring it (rebuilding), and many of you may recognize that the system can be restored to its original state.However, reconstruction itself is a high risk.
5. If one hard drive breaks, the other hard drive may fail.
One hard drive may fail and the other hard drive may fail while being replaced, resulting in RAID corruption.This means that multiple HDDs in a server or other device are often manufactured at the same time as the first failed hard drive, and the timing of breakage and life expectancy is often the same.
6. Failed to remove hard drive
If you remove the failed hard drive and return it in the wrong order or place after checking, it may cause RAID corruption.The location and order of the hard drives in the server equipment are determined.The image is similar to that of a book or a novel, when the order changes, the story changes and the content becomes unclear.If the order of disk removal and installation changes, the integrity of the stored data will be disrupted.
7. Failed while checking hard drive (data deletion or formatting)
When you disconnect a hard drive from a NAS or server and connect it directly to a PC, you may erase the data that was incorrectly saved while trying to verify the data, or you may accidentally format it (initialize).It is important not to panic when working.
8. Operation error on the management screen
If you make a mistake or make a mistake on the management screen, it will lead to RAID collapse.If the hard drive works or fails, open the management screen to change the RAID type to a different type, or initialize the hard drive, so be careful.
How to recover and deal with RAID corruption
Learn what to do in the event of a RAID corruption.
1. Utilization of restoration and restoration software
2. Consultation with a specialized data recovery company
1. Utilization of restoration and restoration software
In the event of a RAID collapse, there is a way to attempt to recover data using the restore software.However, while the restoration software is easy to start using, there is a risk that the data will be overwritten and the condition will deteriorate.In addition, if the hard drive itself is experiencing a physical failure, it cannot be recovered by using the restore software.I often find software that matches my symptoms, and sometimes I only have English manuals and explanations, so I sometimes worry about it.If your data is important, it is also important not to be particular about using the restoration software.
2. Consultation with a specialized data recovery company
When problems such as RAID corruption mode displayed on the management screen, inaccessible data, and what number of HDD is displayed as corrupted, RAID corruption is often more than one cause, and it is often difficult to identify the cause or recover.In case of trouble, start by turning off your server, NAS, and other devices without panic.Professional data recovery companies have expertise and restoration technology to handle any problems that may arise in the event of a RAID crash.If you are storing important data, have a file to use immediately, have a problem with your business, or don′t want to fail, consider consulting a professional data recovery company.Complex information analysis, situational analysis, and recovery work require high technical capabilities.As a criterion for determining the technical capabilities of the restoration company, it will be smooth to check if they have AI technology.
Things you shouldn′t do in the event of a RAID collapse and things you should be careful about
It is important to try not to get worse when a RAID collapse occurs.Please note the following points.
1. Repeat turning on/off/restarting the power supply
2. Replace or replace hard drives
3. Rebuild operations and data reconstruction
4. Recognize the hard drive alone
5. Replacing the RAID Controller Card
1. Repeat turning on/off/restarting the power supply
Avoid repeated power-on/off or reboots of equipment during a RAID crash.Sometimes the condition gets worse.
2. Replace or replace hard drives
Data is not accessible and data recovery is generally possible when a failed hard drive is replaced with a new hard drive in the event of a RAID collapse.However, if you put it back in the wrong order or place, the RAID will collapse and the data will be corrupted.Also, be careful as replacing the hard drive will automatically rebuild.
3. Rebuild operations and data reconstruction
A rebuild is the re-configuration of data in a corrupted hard drive.Rebuilds can restore data, but rebuilds can lead to multiple hard drive failures from a single hard drive failure at first, or deteriorate if data rebuild fails during a rebuild.If the hard drive in the NAS fails, reconstructing or reconfiguring configuration information and data will cause data to disappear, disappear, or initialize, so be careful.If your data is important, the best solution is to turn it off and not turn it on.
4. Recognize the hard drive alone
Even if you take one hard drive out of the NAS and connect it directly to your computer, you won′t be able to access the stored data.Sometimes when I connect directly to the computer, I get a message asking, ′Do you want to format it?′Be careful not to press ′yes′ in a hurry.Once formatted, the data stored on the hard drive will disappear.Format = After initialization, even if you try to build RAID again, you will not be able to read the data.In addition, if the HDD itself fails and energizes, the condition may deteriorate and the data may be overwritten.
5. Replacing the RAID Controller Card
Care should also be taken when a RAID controller card fails or fails.Many cards are special and require specialized knowledge to check and replace compatible cards.If a RAID controller card is replaced with an incompatible hard drive when the hard drive has not failed or failed, you may not be able to read or access the stored data.
↓ If you suspect a RAID controller card failure, please refer to this page.
AT DATA RECOVERY MEDIUM
How to Recover from a RAID Controller Failure
https://www.adte.jp/rec/hdd/post-1500/
US>The RAID controller may fail, such as the file server that is configured for RAID will not start and data will no longer be accessible.The NAS and file servers that make up RAID are often run in locations or backup elements where data is shared at work, school, or home, and once trouble occurs, it may affect not only one person but also multiple people.This section describes the symptoms, possible causes, and recovery methods that occur when a RAID controller fails.
How to Prevent RAID Collapse
If you are building RAID, the equipment will remain operational if the failure of the hard drive is not in the redundancy category.However, if you continue to operate with a defect, one failure will lead to a second failure, which increases the risk of data loss, so you need to be careful.How do I prevent RAID corruption and data loss
①Prepare and prepare replacement hard drives in advance
②Replace the hard drive immediately after one hard drive fails
③rebuild early after replacing the hard drive
It′s also important.
As mentioned above, there is a risk of rebuilding.I checked the procedure of rebuilding on the web, but I don′t understand it well, I read the instruction manual, but I′m worried about how to deal with it or how to do it, so let′s not force ourselves to proceed.In that case, it is important to turn off the power of the device.Consider shutting down and consulting a professional recovery company.This is because if you proceed with the work without knowing it well, you may end up in situations where important data will disappear and it will be difficult to recover the data.Summary - In the unlikely event that RAID collapses,
If you experience problems such as RAID corruption, loss of access to data, loss of read/write, broken number of HDD, or displaying RAID Error on the LCD of the device, you should turn off the device and consult a professional recovery company as soon as possible.This is because if the hard drive or SSD that is building RAID fails or fails, the condition will deteriorate if the power is turned on/off and rebooted repeatedly.RAID systems are often complex and require advanced technical skills and expertise.Advanced technology has AI technology to handle any trouble with RAID corruption.It is also recommended for those who want to save money and restore it.